package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void save(CategoryDTO categoryDTO){

        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        //设置状态信息
        category.setStatus(StatusConstant.DISABLE);
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
//        category.setCreateUser(BaseContext.getCurrentId());

        categoryMapper.save(category);
    }

    /**
     * 根据id删除分类信息
     * 需要检查这种分类是否与菜品和套餐相关联，关联的话就不能删除
     * @param id
     */
    @Override
    public void delete(Long id){
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        //删除分类数据
        categoryMapper.deleteById(id);
    }

    @Override
    public PageResult page(CategoryPageQueryDTO categoryDTO){
        PageHelper.startPage(categoryDTO.getPage(),categoryDTO.getPageSize());
        Page<Category> pageResult = categoryMapper.page(categoryDTO);
        return new PageResult(pageResult.getTotal(),pageResult.getResult());
    }

    @Override
    public List<Category> list(Integer type){
        return categoryMapper.list(type);
    }

    @Override
    public void status(Integer status, Long id){
        Category category=Category.builder().
                id(id).
                status(status).
//                updateTime(LocalDateTime.now()).
//                updateUser(BaseContext.getCurrentId()).
                build();

        categoryMapper.update(category);
    }

    @Override
    public void update(CategoryDTO categoryDTO){

        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }
}
